Radiant-heat projector



March 12, 1929. A WW. 1,7o5,134

RADIANT HEAT FROJECTOR Filed Nov. 21, 1927 Patented Mar. 12, 1929.

UNITED STATES PATENT OFFICE.

AIQTHC'NY PAPINI, OF LEONIA, NFV JEBSEY, ASSIGNOR T PERCY W. VALENTINE, OF

' CAIXEEIDG, MASSACHUSETTS.

RADIANT-HEAT PROJECTOR.

Application filed November 21, 1927. Serial No. 234,687.

primary object of The tion is to pr.I wide an electric heater capable a eoncentrated beam of heat rays en f g from an electric heating unit, and being; celni) t and small in external (iimensions. lt y pi obiem in this nivcntion has been to nrofiucc such a projector f dimensiens guificicntly small to enable it to be used in situations where heaters of the common sunbowl ti ie cannot` be used on account of their and the diffusion of the beanis which they project, and at the same time to develop a large quantity of heat and direct a beam of radiant heat in such concentration that a high temperature may be inai ntained in the path of the beam at a long (nstance from the heat source, without causing the heat rays to converge at a distant focus2 but maintaining a practicable n'nniniuin of dispersion of the rays. As an example of the uses which the pro'jeetor herein disclosed is intended and adapted to serve, I would refer to the patent of P. V. Valentine, No. 17583,- 757, dated May 4:? 1926, which shoi| a sewing' machine using a hot waxed thread and provided with a heat proiector arranged to throw a beam of heat rays on the thread in its passage from the war; pot to the stitch for-miny; point in order to prevent premature chilline; and sti'lfening of the wau in the thread. use small dimensions inthe projector and high concentration of the beam are hi aly desirable. But the apparatus of course/is adapted and intendodto` serve a variety of other uses in which similar concentratien of heat rays in a small to supply a suticient limited quantity of heat from a distant heat source is dcsired.

ln the accoinplishment of my object I have derised a new forin of reflector in association with a heatirg unit and a new combination of heating' unit with rc'tlector and coupliug means` toii'other with new details of construction and arrangement of the various parts of the devicea all contriluitinfg' to the Iinal result of coinpactness and simplicity of structure and the desired couccntratien of re'liected The ini'ention consists in these and and improveinents, as

rays. related novel features will non' be explained in connection with a detailed description of the present preferred embodiment of the invention.

Referring to the drawings,--

Fig. 1 is an axial or longitudinal section of the present invenf a heat }jrojector embodying my invention in its preferred form;

2 is an elevation as seen from the right of Fig. 1; this View showing the front of the projector;

Fig. 3 is a perspeetire View partly broken away and shown in section of the cover fittuig;

Fig. Li is a perspective view of the associated clainping piece and conlining bands disassembled for clearer illust-ration;

i is a perspective View of an insulatin; disk provided to separate the leads from the heatino; element.

Like reference characters designate the same parts wherever they ocCur.

rl`he hcating element is a coil (z of high resistance wire of any Character suitable for this purpose, wound about the outer surface of a eylindrical sleeve or muliie Z) having a ielical groove to position the turns of the coil element and having also a base fiange c. Such base fiange cooperates with the clamping piece or thimble (Z to position and secure the refiector 8, and it is connected to the clainping piece by a single bolt f, passing through alined holes in the contiguous end walls of the muflie and clamping piece, and a nut g threaded on one end of the bolt.

One end of the heating element is passed through a. noteh h in the outer end of the niuftle and through the central passage or bore of the muflie to'the bolt f, with which it is engaged in electrically conductive connection. The lead wire 'i for coupling this terminal of the heating unit with the source of power is brought into the open central recess of the clamping piece and is there held in electrical connection With the bolt by the nut o, under which the terminal of the conductor is placed. rllhe opposite terminal of the coil passos through alined holes and Z: in the niullie base o and in the end wall of the claniping piece, passing into the recess iu the latter, and being there joined to the oirrlfosite lead conduotor Z. An insulatinj Separator disk m is fitted to the recess in the claniping piece, it bein` held therein by frictional peripheral contact with the walls of the re- Fig'. 5

'cess, and. has opposite notchcs a to receive the bare leading in conductors, the body of the disk between these notches holding the bare conductors apart.

The refiector 8 embodies several features nn To Ft C011" suppoi't L L hzwm 121ml ntisf'uous to nfiounted 90 a tubui g unit Aed e cl

encircling 'Lin d groove to Dino' member.

lavin .sup

iav

an and Screx Q1 pi'is lc hev 1 O qy iacec contlhuee :nent wlth the herl side opposite to nplemental clemp- 95 i), ng into tei' e01 a e01 t be p t ugh. tt

il, red

enezfal aline jacen thro.

:t :md cicnpi to'i'cther, :1 e

ecui'in emhe the co-Ve hea e a fiber adap' said wall m g mi. ehh;

't for a colled elec-tr D e euppo 10'] dn.

ith i the cover and passi bii D Juice S211 ol'ifi-r:

cute the cover upon the ch 1 supgo-i having niei and a, wal holt passl'n of Jilewi.

iacent to its smallm' muteiy :w

lem 4h, a

tions; equa eter to Yefle iampip nd c togethe support 1 Vicuh Qoint near the of the its emalie:- end to around said muflie Lo :1 point n and' hzw ng an in the clan) ficel cond pin member nto 1d With :m intrrvned lip qezu Di' end o '111g g nded by the cover,

2:11 h mpmg piece co Shift hnfle 'thing and pal-t ot 110 ion With said ie detachably united tuhulai' n11 :md out- 335 i it w t j :t one Side into i per hel'e- 32 the pet'- amping mem- Yoov` leniei i'ntion t i'ough 1 to said end Wall xhnement with the mte the support, :1 ela prisin 'tt'nWm'fSo W e 21ml outs occup3y throu e outei' I 11 Con sie,D

lto thfende oping piece.

e ot i'vee 1 he cover 11 Ads, Whei'ehy the cove T hoe zm oor it ration 111 th bei' having a h: ngoz't to): zm to the ,L the p' the intm'ned tor nie' nd JV L Vemhe':7 :1 UWM' uazmping mein e ex' :md

nhei' evtox' heat pyojec mounting the c( ing' member.

ping nie riol' pe ."ated in :1 tuhu ientex' com tion i h the alined per'fora' lg thio s to the niem i the sup- 5: a ei' afhxp eof into thei' end servng as e terminal of the heatin ng' the end wa here to'e i Screw for on the clalnping member havi uppol't opposite side of .pnerel aiiiiement Wit nping member having a cenite to the s poyt, said ci G5 tml l'ecess m its slde opoos which said connecting screw extends end is adaptecl. to serve :is binding post for en electrical eoncluctor, end the elemping member having also a perforation alinecl Witn the perforation in the fiange of the coil support, opening into said recess and adapted to receive the second terminal of the heeting' coi] or a lead Wire connected therewith.

13. An electric heater Comprising a tubuler support having transverse wall anel outetencling fianze ;wt one end) the wall und flan being' perforetecl both i. Side ;au-;l outside e15 the tube? en electric heeting elenlent wounfl about said support extending' one sicle into the bo 'e of the tuhe the perifoi'etion thereii'l7 its other end being passed through the perforntion in the outer 'lenge7 a clamping' member having a wall contiguous to said end Wall,

the interior oleinp screw passerforations holding perforateo in elineinent With foratlon of the supportJ 111g through the allnecl 1 the members together and serving es e binding serew :for one terminal of the heeting Geil, the olzunpinp' member having e reoess at the opposite side of the end. wall thereof into which Said oonnecting serew extends end is atleptecl to serve as ay bincling' post :for an electrical eoncluetor, ano the olamping member having also a perforation alinecl With the perforation in the flange of the coil support, opening' into said recess and eclapted to receive the second terniiiml of the hee'ting Coil or e lead Wire connected therewith7 end a Separator disk lit-tes. in the recess of the elanping' member hevinp' Seperatecl notches ,o receive electrical concluetors leading, repeetifely7 to the said eonneeting' screw end ;o the opposite terminal of the heating eoil.

In testilnony Vhereof I have affixecl niy signature.

Ambi- ANTHONY PAPINI. 

